Welder qualification
saleem manhappulath
Amol Betkar
Dear Saleem,
When qualifying a welder, it's crucial to ensure that the welding procedure specification (WPS) matches the materials being welded. While it's possible to use carbon steel (CS) material for welder qualification, it's not advisable if you intend to weld stainless steel (SS) later on.
The reason is that CS and SS have different metallurgical properties, including composition, thermal conductivity, and susceptibility to corrosion. Welding procedures and parameters that work well for CS may not be suitable for SS, and vice versa. Therefore, using CS material for welder qualification with an SS WPS may not accurately reflect the welder's ability to work with SS.
For a valid qualification, it's best to use the same material (SS) for both the WPS and the qualification test. This ensures that the welder's skills are properly assessed for the specific material they will be working with in practice. If you need to qualify welders for both CS and SS welding, you should have separate WPSs and qualification tests for each material.
Regards,
AB
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kumar sumit
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KATHIRAVAN MURUGESAN
I think, yes you can. Only TIG process.
On Tue, 7 May, 2024, 7:35 pm saleem manhappulath, <salee...@gmail.com> wrote:
Dear All
I have a ss wps P-8 to P8, i have plan to qualify welder. Can I use cs material for welder qualification wit
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Mohamed Ali
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venkateswara reddy Desireddy
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Anup N K E
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saleem manhappulath
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venkateswara reddy Desireddy
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venkateswara reddy Desireddy
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KATHIRAVAN MURUGESAN
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Mohamed Ali
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pradip kumar Sil
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Amol Betkar
Dear Saleem,
To determine whether you can use carbon steel (CS) material for welder qualification when you have a stainless steel (SS) Welding Procedure Specification (WPS) that is for P-8 to P-8 materials, we need to consider the relevant codes and standards governing welder qualification.
WPS and P-Number Groups: The Welding Procedure Specification (WPS) you have is for welding P-8 to P-8 materials. In the ASME Boiler and Pressure Vessel Code (BPVC) Section IX, P-Numbers are used to group materials for welding qualification. P-8 refers to a group of austenitic stainless steels.
Welder Performance Qualification: According to ASME Section IX, a welder's qualification is typically done to demonstrate their ability to produce sound welds. The welder qualification test should be performed using the same material group (P-Number) as the WPS. This ensures that the welder is proficient in welding the specific materials and processes described in the WPS.
Using Different Materials for Qualification: ASME Section IX states that a welder qualified on a specific P-Number material is not automatically qualified to weld materials of a different P-Number. Therefore, if you use carbon steel (which is typically a P-1 material) for the welder qualification, this would not qualify the welder for welding P-8 materials (stainless steel) according to the WPS you have.
Summary:
No, you cannot use carbon steel (P-1 material) for welder qualification if your WPS is for stainless steel (P-8 to P-8). The welder must be qualified using materials that fall within the same P-Number grouping as specified in the WPS, which in this case is P-8 (austenitic stainless steel).
Recommendation:
To qualify a welder for the SS WPS (P-8 to P-8), you should use austenitic stainless steel materials for the qualification test to ensure compliance with ASME Section IX requirements.
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Uma sankar Sankar
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